Bonsoir,
Résoudre les équations d’inconnue x suivantes :
a. 7x+17=9x+29
7x - 9x = 29 - 17
- 2x = 12
x = - 12/2
x = - 6
b. 4x+15=7x+24
4x - 7x = 24 - 15
- 3x = 9
x = - 9/3
x = - 3
c. 8x+26=5x+14
8x - 5x = 14 - 26
3x = - 12
x = - 12/3
x = - 4
d. 23x+31=16x+17
23x - 16x = 17 - 31
7x = - 14
x = - 14/7
x = - 2.